Resumes
Resumes
Bengt Hansson Phones & Addresses
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52 Surrey Ln, Holden, MA 01520 (508) 829-5055
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5 Redwood Dr, Princeton, MA 01541 (978) 464-5412 (508) 826-8538
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5 Redwood Dr, Princeton, MA 01541
Work
Position:
Food Preparation and Serving Related Occupations
Education
Degree:
Graduate or professional degree
Emails
Publications
Isbn (Books And Publications)
Individual and Structural Determinants of Environmental Practice
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Author
Bengt Hansson
ISBN #
0754632172
Metod Eller Anarki: [moderna Teorier Om Vetenskapens Vasen Och Metoder]
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Author
Bengt Hansson
ISBN #
9157800871
Us Patents
Piston Construction For Syringes
View pageUS Patent:
39398331, Feb 24, 1976
Filed:
Jan 15, 1975
Appl. No.:
5/541202
Inventors:
Bengt Eve Hansson - Holden MA
Edward A. Tischlinger - Niantic CT
Edward A. Tischlinger - Niantic CT
Assignee:
Astra Pharmaceutical Products Inc. - Worcester MA
International Classification:
A61M 500
US Classification:
128218P
Abstract:
A cartridge for a prefilled hypodermic syringe of the type sealed at its forward end with a destructible diaphragm is provided with a piston-piston rod assembly in which the piston of resilient material is molded in the form of a hollow cylinder and has an auxiliary short, cup-shaped member of reduced diameter coaxially enclosed within its forward end, and sealed in yieldable engagement with the inner walls of said hollow cylinder by a transverse, annularly-shaped elastic membrane. The piston rod has a forward portion of lateral cross-section smaller than the inner cross-sectional area of the piston and slidably receivable in the latter, and a following portion having a lateral cross-section dimension greater than the inner cross-sectional area of the piston, the junction of the two rod portions forming a forwardly directed shoulder. When the piston rod is actuated, the forward reduced portion slides forwardly in the piston until it engages the auxiliary member and causes such member to distend forwardly, while the main body of the piston remains stationary. Continued actuation of the piston rod then brings the shoulder formed by the following rod portion into engagement with the main body of the piston to cause the piston to move as a whole within the syringe cartridge.